Aluminum rods or steel? When it comes to bearing clearances your way better off having them a 1/2 thousnad to loose than 1/4 thousand to tight. Use what dram recommended Or looser BTW, I like thin oil also, 5w20 or 5w30, especially in a drag motor that never gets the oil hot

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)